Yea ya have a butterfly up in the manifold that is suppose to open and close to warm the intake then open to let the heat away . Now in cool or high humidity the carb will sweat and even frost up if cold enough for a short time. . Did you check the timing at full throttle and what heat range plugs are in it . If your working it and this year i noticed when cutting hay with the 706 and a 1219 J D haybine that it was like trying to plow as it was taking a lot of power due to the extra heavy hay crop this year. So if ya jumped up to the 93 octane and the main fuel screw is five turns out the plug heat range is in the C-86 A C -D15Y champ or the 386 or 3116 Auto Lite and your fuel system is full flow and no pluged air filter then you may have done more damage and your in for a rebuild . That is about all i can tell ya setting here and not being there and checking myself .
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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